from car import Car
from car import Battery

class BydElectricCar(Car):
    """表示电动汽车的独特之处"""
    def __init__(self, make, model, year):
        """初始化父类的属性"""
        super().__init__(make, model, year)
        self.battery = Battery()
class BydBattery(Battery):
    """一次模拟电动汽车电瓶的简单尝试"""
    def __init__(self, battery_size=75):
        """初始化电瓶的属性"""
        self.battery_size = battery_size
    def describe_battery(self):
        """打印一条描述电瓶容量的消息"""
        print(f"This car has a {self.battery_size}-kWh battery.")\

    def get_range(self):
        """打印一条消息，指出电瓶的续航里程"""
        if self.battery_size == 75:
            range = 260
        elif self.battery_size == 100:
            range = 315
        print(f"This car can go about {range} miles on a full charge.")

    def upgrade_battery(self):
        """检查电瓶容量"""
        if self.battery_size!= 100:
            self.battery_size = 100
"""一个简单的汽车类"""
